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tile: add null check for kzalloc in tile/kernel/setup.c

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Should check the return value of kzalloc first to avoid the null pointer.
Then can dereference the non-null pointer to access the fields of struct
resource.

Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Wang Sheng-Hui 2013-08-21 21:49:42 -04:00 committed by Chris Metcalf
parent ce61cdc270
commit 6d715790ef
1 changed files with 4 additions and 0 deletions
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4
arch/tile/kernel/setup.c
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@ -1643,6 +1643,8 @@ insert_non_bus_resource(void)
{
struct resource *res =
kzalloc(sizeof(struct resource), GFP_ATOMIC);
if (!res)
return NULL;
res->name = "Non-Bus Physical Address Space";
res->start = (1ULL << 32);
res->end = -1LL;
@ -1660,6 +1662,8 @@ insert_ram_resource(u64 start_pfn, u64 end_pfn, bool reserved)
{
struct resource *res =
kzalloc(sizeof(struct resource), GFP_ATOMIC);
if (!res)
return NULL;
res->name = reserved ? "Reserved" : "System RAM";
res->start = start_pfn << PAGE_SHIFT;
res->end = (end_pfn << PAGE_SHIFT) - 1;